| Behavioral Effects of Tyrosine during Sustained Wakefulness |
DEC 1993 |
24 pages |
| Authors:
D. L. Wiegmann; D. F. Neri; R. r. Stanny; S. A. Shappell; A. H. McCardie; NAVAL AEROSPACE MEDICAL RESEARCH LAB PENSACOLA FL
|
 | The fatigue and cognitive performance deficits associated with sleep loss and stress, like that experienced during sustained flight operations and nighttime flying, have motivated the search for effective nonpharmacological countermeasures. The behavioral effects of the potential countermeasure tyrosine, an amino-acid precursor to dopamine and norepinephrine, were examined during an episode of continuous nighttime work involving one night's sleep loss. Volunteers performed nine iterations of a battery of cognitive and subjective ... |
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| Effects of Methamphetamine and Fatigue on Long- and Short-Term Memory |
NOV 1993 |
27 pages |
| Authors:
R. r. Stanny; A. H. McCardie; D. F. Neri; NAVAL AEROSPACE MEDICAL RESEARCH LAB PENSACOLA FL
|
| We examined the effects of a 10 mg/70 kg oral dose of d- methamphetamine HCI on fatigue-related deficits of short- and long-term memory. We used a recognition memory-search task with two memory loads. In one experimental condition, stimuli were committed to long-term memory (LTM) and performance was rendered automatic by extensive practice with consistently mapped stimuli and responses. In a second condition, the task was organized so that recognition depended ... |
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| Effects of Methamphetamine on Vigilance and Tracking during Extended Wakefulness |
SEP 1993 |
36 pages |
| Authors:
R. r. Stanny; A. H. McCardie; D. F. Neri; NAVAL AEROSPACE MEDICAL RESEARCH LAB PENSACOLA FL
|
| We examine the effects of a 10 mg/70 kg oral dose of d- methamphetamine HCI on high-event-rate vigilance and tracking performance in a 13.5-h sustained-performance session during a night of sleep loss. At 0 1 16 hours, seven subjects were administered d-methamphetamine, double-blind. The remaining six subjects were given a placebo. Values of sensitivity (d) in the vigilance task declined markedly during the night in the placebo group. The methamphetamine ... |
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| Work/Rest Schedules and Performance of F/A-18 Aviators during Fleet Exercise 1992 |
APR 1993 |
29 pages |
| Authors:
S. A. Shappell; D. F. Neri; NAVAL AEROSPACE MEDICAL RESEARCH LAB PENSACOLA FL
|
| As a continuation of our previous work during Operation Desert Shield/Storm, we examined the effect a fleet exercise has on the work/rest patterns, fatigue, and cognitive performance of F/A-18 aviators. For 10 days during Fleet Exercise 1992, 25 pilots from VFA-81 and VFA-83 completed daily work/rest logs while performing their usual tasks. Subjective measure of fatigue, quality of rest, and sleep need were also collected. A subset of these F/A-18 ... |
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| Subjective Fatigue in A-6, F-14, and F/A-18 Aircrews during Operations Desert Shield and Storm |
OCT 1992 |
19 pages |
| Authors:
C. A. DeJohn; S. A. Shappell; D. F. Neri; NAVAL AEROSPACE MEDICAL RESEARCH LAB PENSACOLA FL
|
| Fatigue occurring during naval air combat can reduce performance, impair operational effectiveness, and compromise safety. This study examines the effect of combat missions on the subjective fatigue of naval aircrews deployed aboard USS AMERICA during Desert Shield and Desert Storm. Fatigue was determined using three questionnaires that were completed before and after each mission. Although fatigue significantly increased during combat missions, it usually returned to preflight levels by the next ... |
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| Effects of Dextromethamphetamine on Subjective Fatigue |
AUG 1992 |
18 pages |
| Authors:
C. A. DeJohn; S. A. Shappell; D. F. Neri; NAVAL AEROSPACE MEDICAL RESEARCH LAB PENSACOLA FL
|
| Declining aircrew performance during periods of sustained flight operations (SUSOPs) has underscored the need to develop effective countermeasures. This paper reports on the ability of the central nervous system (CNS) stimulant d-methamphetamine to alleviate the detrimental effects of a simulated SUSOPs on subjective fatigue. Subjective fatigue was repeatedly measured by three questionnaires. The simulated SUSOP started at 1800 and consisted of a 9-h planning session followed by 4 h of ... |
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| Simulated Sustained Flight Operations and Performance. Part 1. Effects of Fatigue |
JUL 1992 |
21 pages |
| Authors:
D. F. Neri; S. A. Shappell; C. A. DeJohn; NAVAL AEROSPACE MEDICAL RESEARCH LAB PENSACOLA FL
|
| Sustained flight operations are likely to produce fatigue and performance decrement in aviators. We assessed changes in cognitive performance using a work/rest schedule modeled on successive long-range attack missions. Twelve subjects performed several subtests of the Unified Tri-Service Cognitive Performance Assessment Battery an the Walter Reed Performance Assessment Battery 18 times during a simulated sustained operation. The scenario consisted of a 9- hr planning session followed by a 4-hr rest ... |
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| Frequency of Color Names for Colors Generated on a CRT |
30 DEC 91 |
14 pages |
| Authors:
J. DiVita; D. F. Neri; M. J. Shim; NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT
|
| Color naming frequency data were collected for 210 equiluminant colors. These colors represent a sample of the color space realizable on a CRT screen. From these data, color naming boundaries were constructed utilizing criteria of 50%, 75%, and 95%. The results of this experiment provide a data base with which to compare alternative strategies for the application of colors to CRT displays.... Color naming, CRT. |
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| Sustained/Continuous Operations Subgroup of the Department of Defense Human Factors Engineering Technical Group: Program Summary and Substracts from the Semiannual Meeting (9th) Held in Pensacola, Florida on 11-12 July 1989 |
MAR 1990 |
65 pages |
| Authors:
D. F. Neri; R. E. Gadolin; NAVAL AEROSPACE MEDICAL RESEARCH LAB PENSACOLA FL
|
| The 9th semiannual meeting of the Sustained/Continuous Operations Subgroup of the Department of Defense Human Factors Engineering Technical Group (DOD HFE SUSOPS/CONOPS Sub-TG) was held on 11-12 July, 1989. The meeting took form of a symposium at the Naval Aerospace Medical Research Laboratory, Pensacola, Florida. Twelve speakers provided overviews of SUSOPS/CONOPS issues and described current research efforts. This document provides a synopsis and abstracts of the presentations, consistent with the ... |
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| An Evaluation of Color Sets for CRT Displays |
31 DEC 85 |
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| Authors:
D. F. Neri; A. R. Jacobson; S. M. Luria; NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT
|
 | Ten subjects performed a color matching task with ten sets of seven colors, adapted from sets recommended in the literature. The color sets covered a wide range in color difference values (delta-E* in CIELUV, 1976). Performance with some color sets was significantly better than that with others on a task where color discrimination was important and the colors needed to be discriminated quickly and accurately. Effectiveness of a color set ... |
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| Effect of Background/Foreground Color Coding on Detection in Acoustic Data Displays |
25 MAR 85 |
14 pages |
| Authors:
D. F. Neri; D. A. Kobus; S. M. Luria; S. Fan; D. Zannelli; NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT NEW LONDON LAB
|
| Considerable work is going on to determine how color should be used to improve the legibility of sonar CRT displays. One of the questions concerns the color that should be used for the background on such displays. Some operators have expressed the opinion that a blue background is preferable to the standard black background because blue is less fatiguing and may enhance target detection. In this study, the ability of ... |
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| The Effect of Set Size on Color Recognition |
25 JAN 85 |
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| Authors:
A. R. Jacobsen; D. F. Neri; NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT
|
| In two separate studies a modification of Sternberg's (13) memory task was used to study the effect of the set size of colored CRT presented stimuli on time to recognition. In both, set sizes from one to seven differently colored circles (memory set) were presented for a variable period of time. Subsequently one colored circle, that had a .50 probability of belonging to the memory set, was presented and the ... |
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| The Effect of Set Size on Color Matching |
14 JAN 85 |
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| Authors:
S. M. Luria; D. F. Neri; A. R. Jacobsen; NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT
|
| Current monochromatic sonar displays are soon to be replaced with chromatic ones. It is anticipated that color coding will enhance the performance of the sonar operators. A number of review articles, however, have pointed out that there are both advantages and disadvantages to the use of color coding. Used inappropriately, it may even degrade performance. The correct application of color coding depends on the nature of the task to be ... |
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| Guidelines for the Use of Color in SUBACS (Submarine Advanced Combat System) A Displays |
16 OCT 1984 |
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| Authors:
D. F. Neri; D. Zannelli; NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT
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| Preliminary guidelines for the implementation of color in Submarine Advanced Combat System (SUBACS) displays have been formulated based on the human factors literature and examples of color coding in existing displays. This allows absolute identification of color with a minimum period of learning. The coding scheme conforms with the cultural convention of associating green or blue with normal operating conditions, yellow with a cautionary state, and red with threat or ... |
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| Individual Differences in Chromatic Brightness Matching |
03 OCT 1984 |
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| Authors:
S. M. Luria; D. F. Neri; NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT
|
| Individual differences in brightness matches between lights of different colors were determined for color-normal observers at both photopic and mesopic light levels using the method of flicker photometry. The standard deviations of the settings made by 52 observers at photopic levels did not exceed 0.1 log unit. Variability was greatest at the extremes of the spectrum. Variability was not appreciably increased at mesopic levels. |
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| Visibility of Various Target-Background Color Combinations under Different Chromatic Ambient Illuminations |
24 AUG 1984 |
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| Authors:
D. F. Neri; S. M. Luria; D. A. Kobus; NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT
|
| The detectability of seven colors presented on a CRT against four background colors was measured under four conditions of ambient lighting. Opponent color pairs were most quickly detected. Detection was enhanced by maximizing both luminance and color contrast, but luminance contrast was much more effective. Chromatic ambient lighting which was a log unit dimmer than the target luminance had no effect on performance. (Author) |
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| Performance and Preference on a Sonar Detection Task under Various Colors of Ambient Illumination |
17 MAY 1984 |
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| Authors:
D. A. Kobus; D. F. Neri; NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT
|
| Twenty observers participated in a sonar detection task under three photoptically matched colors, bright white light, and no ambient light conditions. All trials were run under mesopic conditions to simulate normal operations at sea. The subdued white and the no light conditions resulted in the shortest detection times, followed by the bright white, blue, and red conditions. Most subjects, however, preferred the red or blue illumination. There appears to be ... |
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| Aids for Improving Vision in White-Out. |
13 AUG 1980 |
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| Authors:
C. L. Schlichting; S. M. Luria; J. A. S. Kinney; D. F. Neri; S. W. Kindness; NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT
|
| The ability to see well deteriorates markedly under conditions of uniform visual stimulation (white-out). These conditions are frequently encountered by both the Navy and Marine Corps troops operating in winter environments. This study tested two different visual aids in an attempt to improve vision under these conditions. One of the aids, a yellow goggle, showed promise for improving the perception of depth in both low light and snow conditions. The ... |
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